Check the fuse, if good then check the
thermoswitch in the radiator (it's about an inch and a half in
diameter located on the lower part of the radiator with two wires )
by disconnecting the wires and touching them together (again, with
engine hot...at least 190 degrees) if the fan comes on, you have a
bad switch. If not connect a 10 gauge jumper wire from the battery to
the fan itself...
With power direct from the battery (and
a ground wire, if necessary) fan should run... if not replace the fan
assembly... if it does run then you have a bad cooling fan relay... Hope this helps...:-)

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Hello: Open hood, stand in front of car look on left side (driver side) of engine toward the radiator, there will be a black metal guard, under the guard there will be a small belt. This is the belt that drives the water pump. Make sure the belt is there. If belt is there start car and with engine running check to be sure belt is turning and that the water pump is turning. If all that is okay then you may have blown head gaskets. To check head gaskets you need a sniffer tool to smell the engine coolant which will tell you if you have exhaust gas in the coolant.

It may be overfilled. Do you keep adding coolant when it blows it out? The reservoir has a line to which the coolant should be filled. If overfilled it will blow out when hot. Other reasons may be that the fan that cools the radiator may not be cycling on and off to keep it cool. Also check the small belt on the right front side of the engine that is under a plastic cover that runs the water pump. It sometimes breaks and the water pump stops turning.

If you aren't loosing any antifreeze, you might check to see if the coolant fan on the radiator is coming on. If the thermastat is sticking your radiator hose will be solid to even swellen sometimes. Of course not to mention that if a radiator is over 5 years old, it could be bad, so you may need some things checked futher.

the fans have relays that are located in the fuse box under the hood on the driver side. a quick check involves just switching the a/c clutch relay with the fan relay if they turn on when engine is hot the relay is bad. if not that means there is a bad connection or the temp probe is bad. make sure no loose or frayed wires are present. hope this helps. please rate this solution. thank you.